/**
 * Thinking in Java
 *
 * @version 4th
 * @author Bruce Eckel
 * @see http://www.MindView.net
 */

import java.util.*;

/**
 * Building up a complex model using generic containers.
 */

class Product {
    private final int id;
    private String description;
    private double price;

    public Product(int IDnumber, String descr, double price) {
        id = IDnumber;
        description = descr;
        this.price = price;

        System.out.println(toString());
    }

    public String toString() {
        return id + ": " + description + ", price: $" + price;
    }

    public void priceChange(double change) {
        price += change;
    }

    public static Generator<Product> generator = 
        new Generator<Product>() {
            private Random rand = new Random(47);

            public Product next() {
                return new Product(rand.nextInt(1000), "Test", 
                        Math.round(rand.nextDouble() * 1000.0) + 0.99);
            }
        };
}

class Shelf extends ArrayList<Product> {
    
    public Shelf(int nProducts) {
        Generators.fill(this, Product.generator, nProducts);
    }
}

class Aisle extends ArrayList<Shelf> {
    public Aisle(int nShelves, int nProducts) {
        for(int i = 0; i < nShelves; i++) {
            add(new Shelf(nProducts));
        }
    }
}

class CheckoutStand {}
class Office {}

public class Store extends ArrayList<Aisle> {
    private ArrayList<CheckoutStand> checkouts = new ArrayList<CheckoutStand>();
    private Office office = new Office();

    public Store(int nAisles, int nShelves, int nProducts) {
        for(int i = 0; i < nAisles; i++) {
            add(new Aisle(nShelves, nProducts));
        }
    }

    public String toString() {
        StringBuilder result = new StringBuilder();
        for(Aisle a : this) {
            for(Shelf s : a) {
                for(Product p : s) {
                    result.append(p);
                    result.append("\n");
                }
            }
        }
        return result.toString();
    }

    /**
     * main()
     * 
     * @param args array of string arguments
     */
    public static void main(String[] args) {
        System.out.println(new Store(14, 5, 10));
    }
}

/**
 * output:
 * 258: Test, price: $400.99
 * 861: Test, price: $160.99
 * 868: Test, price: $417.99
 * 207: Test, price: $268.99
 * 551: Test, price: $114.99
 * 278: Test, price: $804.99
 * 520: Test, price: $554.99
 * 140: Test, price: $530.99
 * 704: Test, price: $250.99
 * 575: Test, price: $24.99
 * 674: Test, price: $440.99
 */